tower



(N0 l.) 28heet-Sheet 2.

G. B. N. TOWER;

STEAM PUMP I N0. 258,157. Patented Maylfi, 1882.

WITNESSES JV'V'EJVTOR PETERS Pnuwum n w. wane- 1mm c UNITED STATESPATENT OFFICE.

GEORGE E. N. TOWER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO EDWARDL. LAMBIE, OF WASHINGTON, DISTRICT OF COLUMBIA.

STEAM-PUMP.

SPECIFICATION forming part of Letters Patent No. 258,157, dated May 16,1882. Application filed February 9,1882. (No model.)

To all whom it may concern:

Be it known that I, GEORGE E. N. TOWER,

a citizen of the United States, residing at New York city, in the countyof N ewYork and State of New York, have invented certain new and usefulImprovements in Steam-Pumps and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

Thisinvention relates to certain new and useful improvements insteam-pumps, more especially designed for forcing water up in buildingswhere there is not sufficient head for that purpose; and to thisend theinvention consists in novel features of construction and combination andarrangement of parts, all as will be hereinafter fully described, andset forth in the claims hereto annexed. Referring to the accompanyingdrawings, which form a part of this specification, Figure 1 represents atop view or plan of my improved pump; Fig. 2, a side elevation, partlyin section, of the same. 2 5 In the drawings, Arepresents a castironsupporting-frame, provided on one side and near its ends with suitabletransverse bearing-boxes, B B, closed by suitable caps, b b, withinwhich boxes are arranged suitable hollow trunnions, c (1, formed or castintegral with the steam and water cylinders G D, having their open endsclosed by slotted and screw-threaded caps c d, through which the pistonsfor said cylinders move. 5 E and F represent the respective pistons forsaid steam and water cylinders O D, and which pistons are connected attheir outer ends by suitable slotted lugs, e f, with the crank-pin g ofthe crank G, journaled in a suitable bearin g or box, h, of thesupporting-frame, and carryin g at its outer endthe'balance or fly wheelH. The trunnioned steam-cylinder is provided with steam inlet andexhaust ports a a, that are adapted to alternately register with the 4 5corresponding ports, a a, leading to a steamchest, for admitting andexhaustingsteam from said cylinder as itis oscillated; and thewatercylinder is also provided with similar ports, a a registeringalternately with inlet and outlet ports, for admitting and dischargingthe water therefrom as said cylinder is oscillated.

i i represent suitable packing-rings arranged around said trunnionsc d,which can be readily removed when worn and replaced by new ones bysimply removing the caps 11 b of the bear ing-boxes B B for thetrunnions.

The operation of my improved pump is as follows: The several parts ofthe pump occupying the position shown in Fig. 2, with the steam-pistonat nearly the end of its forward stroke and the water-piston at nearlythe end of its backward stroke, the exhaust-ports are nearly registeredfor exhausting the steam from its cylinder, with the inlet-ports nearlyregistered for admitting water to its cylinder, and upon a slightfurther movement of the steam and water cylinders in their oscillationsproduced by the movement of their pistons, in connection with themomentum of the fly or balance wheel, the steam-cylinder will beexhausting its steam and the water-cylinder admitting water thereto,which action of the water on the piston in the water-cylinder, inconnection with the momentum of the fly or balance wheel, will force thepistons simultaneous- 7 5 1y in the same directions or simultaneously inopposite directions in their respective cylin ders, which, at the end ofthe above strokes of said pistons, will oscillate their cylinderssufficiently to allow their ports to register for the admission of steamto the steam-cylinder and the discharge of water from thewater-cylinder.

It will be observed that by the above-described construction of pump Iobviate the use of valves, as the trunnioned cylinders form in 8 5themselves the necessary valves for closing the ports; and, further, Iam enabled to utilize what head of water there may be, in connectionwith the momentum of the fly or balance wheel, in giving thereturn-stroke to the steamo piston and the forward or outward stroke tothe water-piston, whereby but little steam is required in operating thesteam-pump and the condensing of steam avoided.

It will be observed that all parts of my im= 5 proved steam-pump may beor are formed from cast-iron, and which can be easily and quickly fittedtogether, thus forming a cheap and durably-constructed pump, which isvery effective in operation.

It will be observed that the trunnioned cylinders forming in themselvesthe necessary valves, said valves must have a positive movement due tothe simultaneous movement of the cylinder. No doubttheenginc and pumpwould stop if it were not for the movement of the fly or balance wheeland any pressure from the head of the Water assisting in allowing saidpistons in passing the dead-center.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a steam-pump, thecombination oftrunnioned steam and watercylinders, having inlet and outlet ports adapted to register withcorrespondingports for admitting and exhausting steam, and admitting anddischarging water from them, respectively, and pistons con nectedtogether and adapted to be moved simultaneously in opposite directionsin their respective cylinders, and communicating oscillatin g movementsthereto, substantially as and for the purpose specified.

2. In a steam-pump, the combination of trunnioned steam and watercylinders, having inlet and outlet ports adapted to register withcorrespondingports for admitting and exhausting steam, and admitting anddischarging water from them, respectively, pistons adapted to move insaid cylinders, and crank or similar connection provided with a fly orbalance wheel, connecting said pistons together, whereby they areadapted to be moved simultaneously in opposite directions in theirrespective cylinders, and communicating oscillating movements thereto,substantially in the manner as and ,for the purpose herein shown anddescribed.

3. In a steam-pump, the combination of the supporting-frame A, havingbearing-boxes B B, provided with caps 11 b, and inlet and outlet ports aa cylinders G D, and trunnions c d, having inlet and outlet ports a a,pistons E I and crank G, provided with crank-pin g, to which saidpistons are connected, and fly or balance wheel H, the several partsconstructed andv relatively arranged to operate substantially in themanner as and for the purpose herein shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE B. N. TOWER.

Witnesses:

E. L. LAMBIE, JAS. S. OHALKER.

